diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e7cb136..cd457f9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -70,7 +70,7 @@ jobs:
             minos: 7.0
     runs-on: macos-12
     env:
-      MBEDTLS_VERSION: 3.3.0
+      MBEDTLS_VERSION: 3.4.0
       READLINE_VERSION: 8.2
       SLANG_VERSION: 2.3.3
       NEWT_VERSION: 0.52.23
@@ -494,7 +494,7 @@ jobs:
         - aarch64-linux-musl
     runs-on: ubuntu-latest
     env:
-      MBEDTLS_VERSION: 3.3.0
+      MBEDTLS_VERSION: 3.4.0
       LIBUSB_VERSION: 1.0.26
       READLINE_VERSION: 8.2
       SLANG_VERSION: 2.3.3
diff --git a/patches/mbedtls/0001-Allow-empty-x509-cert-issuer.patch b/patches/mbedtls/0001-Allow-empty-x509-cert-issuer.patch
index 6696609..2489d93 100644
--- a/patches/mbedtls/0001-Allow-empty-x509-cert-issuer.patch
+++ b/patches/mbedtls/0001-Allow-empty-x509-cert-issuer.patch
@@ -1,35 +1,34 @@
-From 632cdb6de3f1693fb90d60d81552b723e8dd5e84 Mon Sep 17 00:00:00 2001
+From 2c8190847d4bd07db579bdea954d44fcf506a926 Mon Sep 17 00:00:00 2001
 From: Nick Chan <towinchenmi@gmail.com>
-Date: Wed, 25 Jan 2023 01:53:00 +0800
+Date: Sat, 27 May 2023 20:54:54 +0800
 Subject: [PATCH] Allow empty x509 cert issuer
 
 ---
- library/x509_crt.c | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
+ library/x509_crt.c | 11 -----------
+ 1 file changed, 11 deletions(-)
 
 diff --git a/library/x509_crt.c b/library/x509_crt.c
-index 0eee97cb6..46702f683 100644
+index cf62532f2..a753b0aec 100644
 --- a/library/x509_crt.c
 +++ b/library/x509_crt.c
-@@ -1185,14 +1185,14 @@ static int x509_crt_parse_der_core( mbedtls_x509_crt *crt,
-     if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-     {
--        mbedtls_x509_crt_free( crt );
--        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT, ret ) );
-+        // mbedtls_x509_crt_free( crt );
-+        // return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT, ret ) );
-     }
- 
-     if( ( ret = mbedtls_x509_get_name( &p, p + len, &crt->issuer ) ) != 0 )
-     {
--        mbedtls_x509_crt_free( crt );
--        return( ret );
-+        // mbedtls_x509_crt_free( crt );
-+        // return( ret );
-     }
+@@ -1059,17 +1059,6 @@ static int x509_crt_parse_der_core(mbedtls_x509_crt *crt,
+      */
+     crt->issuer_raw.p = p;
  
+-    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+-                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+-        mbedtls_x509_crt_free(crt);
+-        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_FORMAT, ret);
+-    }
+-
+-    if ((ret = mbedtls_x509_get_name(&p, p + len, &crt->issuer)) != 0) {
+-        mbedtls_x509_crt_free(crt);
+-        return ret;
+-    }
+-
      crt->issuer_raw.len = p - crt->issuer_raw.p;
+ 
+     /*
 -- 
 2.39.1